The final pillar of mastery is knowing how to secure, observe, and extend your platform. This section covers the crucial tasks of building confidence in your system's health and its defense against threats.
: Partitions resources in a cluster, allowing for multiple isolated environments.
: Maintains network rules for communication between services.
The foundational infrastructure that makes up a Kubernetes cluster. 1. Control Plane The final pillar of mastery is knowing how
Ensures that all (or some) nodes run a copy of a specific pod. Commonly used for deploying cluster storage daemons, metrics collectors, or log collection agents.
A daemon that embeds the core control loops (like node controller, replication controller, and endpoint controller) to regulate the state of the cluster.
Indicates whether the container is running; if it fails, K8s kills and restarts it. : Maintains network rules for communication between services
Want to keep this reference guide handy at all times? Download the complete, high-resolution cheat sheet for offline reading, complete with architectural diagrams, command reference sheets, and real-world yaml snippets. If you need help practicing or implementing these, tell me:
The guaranteed minimum. The minimum amount of CPU and Memory a container needs to guarantee scheduling. 34. Resource Limits
Automatically sets the resource requirements and limits for your containers. Control Plane Ensures that all (or some) nodes
The default Service type that exposes the Service on a cluster-internal IP, making it only reachable within the cluster.
Manages the deployment and scaling of stateful applications. It provides guarantees about the ordering and uniqueness of pods, using persistent identifiers. 15. DaemonSets
As a DevOps engineer, staying ahead of the curve in the world of containerization and orchestration is crucial. Kubernetes, an open-source container orchestration system, has become the de facto standard for automating deployment, scaling, and management of containerized applications. With its vast array of features and complexities, mastering Kubernetes can be a daunting task. That's why we've put together 50 essential Kubernetes concepts that every DevOps engineer should know.
The brain of the cluster that coordinates all activities, detects anomalies, and schedules workloads.
The actual software that fulfills the Ingress rules (e.g., NGINX, Traefik, Envoy). It does not install automatically with the cluster. 25. NetworkPolicy